<!DOCTYPE HTML>
<html>
<head>
<style>
body {
  width: 1500px;
  overflow: hidden;
}
div#bottom {
  position: fixed;
  left: 0;
  top: 0;
  height: 200px;
  width: 200px;
  background: green;
}
</style>
</head>
<body>
<div style="margin-left:200px; left:200px; width:100px; height:100px; background:pink;"></div>
<div style="left:0; width:500px; height:20px; background:blue;"></div>
<div id="bottom"></div>
</body>
</html>
